diff mbox series

[v1,1/4] migration/multifd: Change multifd_load_cleanup() signature and usage

Message ID 20230210063630.532185-1-leobras@redhat.com (mailing list archive)
State New, archived
Headers show
Series [v1,1/4] migration/multifd: Change multifd_load_cleanup() signature and usage | expand

Commit Message

Leonardo Bras Feb. 10, 2023, 6:36 a.m. UTC
Since it's introduction in commit f986c3d256 ("migration: Create multifd
migration threads"), multifd_load_cleanup() never returned any value
different than 0, neither set up any error on errp.

Even though, on process_incoming_migration_bh() an if clause uses it's
return value to decide on setting autostart = false, which will never
happen.

In order to simplify the codebase, change multifd_load_cleanup() signature
to 'void multifd_load_cleanup(void)', and for every usage remove error
handling or decision made based on return value != 0.

Signed-off-by: Leonardo Bras <leobras@redhat.com>
---
 migration/multifd.h   |  2 +-
 migration/migration.c | 14 ++++----------
 migration/multifd.c   |  6 ++----
 3 files changed, 7 insertions(+), 15 deletions(-)

Comments

Juan Quintela Feb. 10, 2023, 12:46 p.m. UTC | #1
Leonardo Bras <leobras@redhat.com> wrote:
> Since it's introduction in commit f986c3d256 ("migration: Create multifd
> migration threads"), multifd_load_cleanup() never returned any value
> different than 0, neither set up any error on errp.
>
> Even though, on process_incoming_migration_bh() an if clause uses it's
> return value to decide on setting autostart = false, which will never
> happen.
>
> In order to simplify the codebase, change multifd_load_cleanup() signature
> to 'void multifd_load_cleanup(void)', and for every usage remove error
> handling or decision made based on return value != 0.
>
> Signed-off-by: Leonardo Bras <leobras@redhat.com>

Reviewed-by: Juan Quintela <quintela@redhat.com>
Peter Xu Feb. 10, 2023, 5:18 p.m. UTC | #2
Leo,

Please still provide a cover letter as long as >1 patches will be posted as
a set.

Not only because it still always help to provide an overview for reviewers
before reading each of them (e.g. I have a habit of prioritizing reviews
based on cover letters first), but also when you're confident enough the
reviewer(s) can ACK the patches in one reply. :-)

On Fri, Feb 10, 2023 at 03:36:28AM -0300, Leonardo Bras wrote:
> Since it's introduction in commit f986c3d256 ("migration: Create multifd
> migration threads"), multifd_load_cleanup() never returned any value
> different than 0, neither set up any error on errp.
> 
> Even though, on process_incoming_migration_bh() an if clause uses it's
> return value to decide on setting autostart = false, which will never
> happen.
> 
> In order to simplify the codebase, change multifd_load_cleanup() signature
> to 'void multifd_load_cleanup(void)', and for every usage remove error
> handling or decision made based on return value != 0.
> 
> Signed-off-by: Leonardo Bras <leobras@redhat.com>

Reviewed-by: Peter Xu <peterx@redhat.com>
diff mbox series

Patch

diff --git a/migration/multifd.h b/migration/multifd.h
index ff3aa2e2e9..9a7e1a8826 100644
--- a/migration/multifd.h
+++ b/migration/multifd.h
@@ -16,7 +16,7 @@ 
 int multifd_save_setup(Error **errp);
 void multifd_save_cleanup(void);
 int multifd_load_setup(Error **errp);
-int multifd_load_cleanup(Error **errp);
+void multifd_load_cleanup(void);
 bool multifd_recv_all_channels_created(void);
 void multifd_recv_new_channel(QIOChannel *ioc, Error **errp);
 void multifd_recv_sync_main(void);
diff --git a/migration/migration.c b/migration/migration.c
index 7a14aa98d8..ce962ea577 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -543,13 +543,7 @@  static void process_incoming_migration_bh(void *opaque)
      */
     qemu_announce_self(&mis->announce_timer, migrate_announce_params());
 
-    if (multifd_load_cleanup(&local_err) != 0) {
-        error_report_err(local_err);
-        autostart = false;
-    }
-    /* If global state section was not received or we are in running
-       state, we need to obey autostart. Any other state is set with
-       runstate_set. */
+    multifd_load_cleanup();
 
     dirty_bitmap_mig_before_vm_start();
 
@@ -649,9 +643,9 @@  fail:
     migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE,
                       MIGRATION_STATUS_FAILED);
     qemu_fclose(mis->from_src_file);
-    if (multifd_load_cleanup(&local_err) != 0) {
-        error_report_err(local_err);
-    }
+
+    multifd_load_cleanup();
+
     exit(EXIT_FAILURE);
 }
 
diff --git a/migration/multifd.c b/migration/multifd.c
index b7ad7002e0..174726982c 100644
--- a/migration/multifd.c
+++ b/migration/multifd.c
@@ -1022,12 +1022,12 @@  static void multifd_recv_terminate_threads(Error *err)
     }
 }
 
-int multifd_load_cleanup(Error **errp)
+void multifd_load_cleanup(void)
 {
     int i;
 
     if (!migrate_use_multifd() || !migrate_multi_channels_is_allowed()) {
-        return 0;
+        return;
     }
     multifd_recv_terminate_threads(NULL);
     for (i = 0; i < migrate_multifd_channels(); i++) {
@@ -1067,8 +1067,6 @@  int multifd_load_cleanup(Error **errp)
     multifd_recv_state->params = NULL;
     g_free(multifd_recv_state);
     multifd_recv_state = NULL;
-
-    return 0;
 }
 
 void multifd_recv_sync_main(void)